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3 years ago

A solid has 12 faces and 18 edges how many vertices does it have

Mathematics

1 answer:

frutty [35]3 years ago

6 0

Answer:

8 vertices

Step-by-step explanation:

Use Euler's Theorem: V-E+F=2

F=12

E=18

Thus, we have:

V-18+12=2

V-18=-10

V=8

So there are 8 vertices

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A cable weighing 0.6 pounds per foot is attached to a small 80-pound robot, and then the robot is lowered into a 60-foot deep we

ollegr [7]

Answer:6060 foot-pounds

Step-by-step explanation:

Given

Weight of cable(w')=0.6 pound per foot

depth of well=60 foot

weight of wrench=7 Pound

Now work done in raising monkey with wrench $=w\cdot h$

$W_1=(80+7)\cdot 60=5220$ foot-pounds

Now work done in raising rope

robot rises by climbing up the cable with one end of the cable still attached thus robot support half the weight of cable so work done

$W_2==\int_{0}^{60}\frac{w'}{2}xdx$

$W_2=0.3\times 0.5\times (x^2)_0^{60}$

$W_2=540$ foot-pounds

$W_{net}=5220+540=6060$ foot-pounds

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2 years ago

Five swimmers entered a competition. Four of the swimmers have had their turns. Their scores are 10.8s, 10.75s, 10.79s and 10.81

Shalnov [3]

Answer:

10.74s or faster (lower)

Step-by-step explanation:

The lowest time out of all of them is 10.75, so to all the 5th swimmer needs to do to win is to undercut the swimmer who got 10.75s by a 100th of a second. i.e 10.74s or faster (lower) would win.

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3 years ago

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2 years ago

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There are 347 students going on a field trip. Each bus holds 44 students. If each bus costs $95, is the total cost of the buses

Paul [167]

No, the total cost will be less than $1000.

There will be 7 buses with 44 students each and one bus with 39 students. So in there will be 8 buses in all.

8*$95=$760

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2 years ago

What is wswssssssssss 4+4?

alex41 [277]

Answer: 4+4=8

Hope this helps :)

Step-by-step explanation:

Say you have four apples, and your friend gives you four more. You put together the amount of apples you have and you get 8.

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3 years ago